User manual

Adjustments are complete when the leaf borders on the film line up with the overlaid

MLC leaf borders (solid blue lines, dotted blue line are leaf center lines).

The space around the leaf center line is used to create profiles to detect the leaf

openings as extrema. Select the “Leaf Analysis” tab to commence the analysis.

The upper part of the leaf analysis shows the profiles along the center lines for the

selected leaf and beam ranges (bottom row). One can only select leafs located inside

the region of interest determined by the center section (green dashed rectangle) and for

detected beams (red number labels). The leaf openings are determined as intersections

of the profiles with a threshold value (red line in the upper chart). This detection

threshold can be adjusted using the buttons. The profile values might vary due

to distortion of the measurements. Another factor is the measurement actually

determines dose equivalent value. The distortion and dose equivalent value can bias

the shape of the scanned profile.